Mold for teeth for diamond saws.



W. I'. MBYBRS. MOLD ron TBBTH Fon DIAMOND sms. APPLICATION FILED DEO.16,1908.

932,488, Patented Aug. 31. 1909.

2 SHEETS-SHEET 1.

W. F. MBYBRS.

MOLD FOR TEETH FOB. DIAMOND SAWS.

APPLxoATIoN rxLnn nno.1o,1oos.

932,488. Patnted Au 1,1909.

9 SHE SHEET Z.

ve FS for the stone, and to remedy WILLARD F. MEYERS, 0F NEW YORK, N. Y.

MOLD FOR TEETH FOR DIAMOND SAWS.

Specification of Letters Patent.

Patented Aug. 31, 1909.

Application med Decemberv16, 1908. Serial No. 467.900.

To all whom it may concern-.-

Be it known that. l, WILL/mo l". Mareas, a citizen of the United States, residing at Long island (lity, borough of Queens, city of New York, in the county of Queens and State of New York, have invented certain new and useful.improvements in Molds for 'l`eeth for Diamond Saws, of which the vfollowing is a specification, reference being had therein to the accom pau ying drawings, `forming part thereof.

l\l y invent'on relates to molds and particularly to molds for teeth for diamond saws for sawing stone.

(lne object of myinvention is to overcome numerous difficulties heretofore encountered in the use ot molds of this class. For exam ile, as the lnolten metal cools in the mold am contracts the usual amount in passing from the molten to the solid state, the hard, incompressible diamonds in the bottom of the mold prevent the cutting edge of the tooth from 'contracting proportionately to the remainder, with the result that the out ting edge ofithe toot-li is bowed outwardly; inasmuch as the saw ents but approximate y one-two hundred 'fiftieths of an inch per stroke, it is essential that the diamonds should be very accurately set and that each stone Should Ado its share of the work, and l therefore make the bottom of the mold u wardly arched sufficiently to counteract tf'rie bowing due to the unequal contraction, so that, when the tooth has cooled and hardened, the cutting edge is true and all the diamonds are in line. lt has also proved difficult to .provide satisfactory vertical clam )ing metins for suel1 niolds, since in the usual construction vertical bolts must screw into bores rovided between twoseparate side pieces, lialf of the bore being in one and half in the other side. piece, a construction weak and inconvenient. '.lo obviate this, I employ a separate base piece constructed so as to bridge across the vertical clamping bolts so that. the vertical clamping bolts may pass through it and leave the base integra thus providing a bottom clamp as well as a top one. Furthermore, it has heretoforebeen found dif fi cult to insure that the molten metal will run sufficiently in the corners around the diamonds to provide a firm and secure setting this 1 provide rrooves in the mold as runways aboutthe seats for the diamonds, thus furnishing greater space labout the stone in which the metal can flow. It has also proved difficult,v

with the gates commonly used to run the metal evenly into the mold, so as to prevent any flaws iu the tooth, and to overeon'ie this difficulty l provide an improved gate of dumb-bell shape in cross-section, having the sides parallel and its ends enlarged and outwardly flaring.

Another object of my invention is to provide simple means for adjusting the length of the mold cavity, and to provide guides during such adjustment.

Other objects are simplicity, reliability.

Still other objects and advantages of my invention will appear from the following description.

l. shall now describe my invention with reterence to the accompanying drawings and shall thereafter point out my invention in claims.

Figure 1 is a view partly in wlan and partly in section of' my mold assemb ed, the section efficiency and being on planes indicated by the broken line 1--1 of l4 1g. 2. Fig. 2 is a sectional elevation on the plane indicated by the line 2 2 of' Fig. 1, looking upward. Fig. 3 is a transverse section on a )lane indicated by the line 3--3 of Fig. 1. lig. 4 is a perspective View of the upper section of the mold shown at the left in Fig. 2. Figs. 5 and 6 are enlarged dctail -views showing the manner of embedding the diamonds, Fig. 5 being a plan view and Fig. 6 being a vertical section on the plane indicated by the line 6--6 of Fig. 5. Fig. 7 is a view in elevation of n portion of a completed tooth molded in my mold showing the straight operating edge. Fig. S is a similar view of a tooth molded in a mold having the usual straight bottom, showing the objectionable curved edge. somewhat exaggerated.

lu the embodiment of my invention shown in the drawings, l construct the mold in five main pieces, two upper side pieces or sections 11 and 12, and two lower side pieces 13 and 14, and a T-shaped base piece 15. 'lho upper side pieces 11 and 12 are rabbeted to form. the upper part of the mold cavity and Athe lower pieces 13 and 14 are spaced apart a distance equal to the width of the combined rahbets of the upper pieces by the stem of the T-shaped base iiece, which extends upward between the ower side pieces and forms the bottom of the mold. -'l`o limit the length-of each mold cavity, I provide in the rabbets partition pieces 16 riveted on thenppersidepieee1 1 and similar partition pieees 17 on the side pieee 12, and these partitions extend down to the base ieee 15 and tit tightly in the eavity formed )v the rabbets to form the ends of the mold. .A ln diamond saw eonstruetion the. diamond studded teeth are set in note-hes in the edge of the saw blade and in use. the. saw blade stretebes and 4widens the notehes so that, with eaeh sueeessive setting of teeth, wider teeth are required to till the notehes. 'lo

meet this ditlieulty, the width of the mold,

eavitie-s must be ehangeable, and for this purpose l make the upper side pieees longitudinally adjustable re atlve to eaeh other so that the partition pieees 111 and 17 may be either brought closer together or moved far ther apart. and thus vary the length of the mold.

The lower side )ieees 11i and 14 are seeured to the tongue of tlhe base 15 by tbe elamping bolts 18, which pass through holes in the. pieee 13 and the tongue and serew into the iieee 14. Dritt pins 111 may be employed to bring the. holes in proper alinement. 'l`he )ieees 11 and 12 are. elamped together by bolts 20, whieh pass through apertures in the pieee 11 and serew into the pieee. 12, 'l`o permit the relative longitudinal adjustment. of these iieees above referred to, the apertures in the. pieee 11 are elongated as shown. 'lhe upper parts are clamped down on the lower parts by the usual verti `al elamping bolts 21, Whieh pass through similarly elongated slots between the, side pieees 11 and 12 and serew into the. base 15. Tashers 22 elose the upper ends of the slots for the. bolts 21 and serve. as the upper elamping means and the base. 15 serves as the lower elamping means, thus providing a. strong and convenient means for clamping and leaving the base pieee 15 integral beeause of the fact that, while the holes for the clamp bolts 21 eut through the tongue or stem of the T-shaped base pieee 15, the lower iart of this base )ieee is of sutlieient width to reeeive and bridge aeross the bolts 21 which serve as elamping means. A tongue. 23 on the. pieee 12, tltting in a longitudinal groove in the pieee 1 1, keeps the parts in eorreet vertieal alinement during their adjustn'ient, and they partitions 16 and 17, extending down between the pieees 13 and 14, also serve. as guides to keep the upper side. pieees in aeeurate lateral alinement with the lower side pieees.

ln setting or embedding the diamonds in the edge of a tooth, it is very important that the steel or other metal shall flow around the diamond to a sutlieient extent to firmly and seem-ely hold the diamond in plaee, the diamonds being set alternately on the corners of the cutting edge. of the tooth in zig-zag fashion and are correspondingly placed and held in the Corners of the mold before the metal is admitted. A ditlieulty in praetiee is found in the. faet that the molten metal does not fully penetrate into the. sharp eorvners and angles around the diamoml, with the. result that the setting of the. diamond is not seeure. ln my invention triangular grooves 24 are provided in the lower side pieees adpufent to the diamond and are. arranged in pairs with a. groove on eaeh side of a diamond leaving an intervening ridge against whieh the. diamoml rests, the. grooves permitting the. metal to tlow freely around the diamond. Also the tongue portion of the basev pieee. 15 has its eorners removed, forming beveled faees which form grooves with the. side pieees, tlms further facilitating the free. arf-ess of the. molten metal to all sides of the diamomls. 'lhese t'aees are easily beveled beeause of the faet that the base pieee 15 is a separate pieee. and ean be worked upon separately; and the faet that it is T.sha.ped in eross-seetion renders possible the use. ot the vertical elamping bolts 21 with a separate bottom pieee, sinee, as above noted, the base pieee is not eut in separate. pieees by the. holes for the. bolts 2l. 'lhe exeess of metal entering the grooves 24 and 25 is readily surfaeed olf after the teeth are removed from the mold. A point of advantage of this eonstruetion is the. faet that, inasmueh as the ridges against which the diamonds rest are in the same plane as the faees of the mold and are iimnovable, the diamonds in the completed teeth must always be. in the same. position relative to the edges of the teeth, in eontrast to eonstruetions, for example, in which the. diamonds are, held in plaee in reeessed portions of the molds by a plurality of adjustable. pins projeeting in from the sides and bottom of the. mold, the. diamonds being supported on the, points of the pins.

For holding the. diamonds in the mold, I employ adjustable inelined pins 2G. 'lhese pins form no part of this invention, but were the, subjeet of a prior invention by me., for which l seenred Letters vlatent No. 387,986, dated August 14, 1R88. llaeh of these. pins eonsists of a. sei-ew having a milled head with an internal bore. in whieh is inserted a small wire. 'lhe pins are. adjusted with the wires in eontaet with the diamonds, as shown in Figs. 5 and o, ar the wires are fused with the. molten metal.

lt has been found in praetiee that with the gate. ordinarily employed, the molten metal will not run ever" into the mold` sinee it tends to run faster in the middle. of the oritiee than at the. edges, land therefore flaws and imperfeetions in the completed teeth are eommon. 'lo obviate this l have provided an improved gate 27, whieh is of dumbbell shape in cross-section. At its inner end the gate is merely oblong and toward the mouth the ends are rounded and flare outwn rd while the sides at the middle of the gate are parallel. rlhis shape retards the llow oll metal at the middle and allows it to llow freely at the ends or edges, resulting in a more even filling ol` the. mold. At enoh edge. ol' the gate. plugs 28 are provided to prevent the molten metal l'rom running into the horizontal groove in tho upper side piece ll.

As the molten metal cools in the mold, it contracts thc usual amount, lult, due to the. presence of the hard, incompressible diamonds on the cutting edge of the tooth, the contraction is necessarily uneven and the cutting edge is therefore bent or warped and, in the common practice heretofore, is bowed. outwardly, as shown in Fig. S. This throws the diamonds out of line and, since the cut is very slight with each reeiprm-ation ol tho, saw (ap]noximately l/25uth of an inch), the ollieieney is thereby greatly impaired. ',lo eounteruet this, l bow or arch the bottom ol` the mold upward, as shown in Fig. 2, to an extent exactly equal to the outwardly bowing tendency due to the uneven mntraetion ol the tooth, having determiiud this by experiment. The result is that in the conipleted tooth the diamonds are in exact alinemont as shown in Fig. 7.

lt is` evident that as many molds may be runde together as is desired. Alter the metal has cooled, the mold is taken apart -and tho excess metal which was contained in the grooves and in the. gate is removed, after which the usual grooves on the sides of the tooth for the. wedges are milled in.

lt is obvious that various mmlilieations may be made in the construction shown and above particularly described within tho principle and scope of my invention.

l. ln a mold., in combination with the sides, a T-shaped base piece having its stem extending upward/us a tongue between the sidos and forming the bottom ol` the mold.

2. A mold l'or teeth for diamond saws having its bottom upwardly arched longitudinally of the mold.

It. ln a mold, in wmbinntion with the sides, a T-shaped base pieeel having its stem extending upward as a tongue between the sides and forming the bottom of the mold and having its lateral edges beveled to form grooves with the sides.

1. ln a mold l'or tooth for diamond saws, side pieces having a plurality ol` grooves therein disposed about the situs of the diamonds.

5. A moldfor teeth for diamond. saws eemprising sideI ieces having a plurality of grooves therein disposed about the situs of the diamonds, and a bottom having its lateral edges beveled to form grooves with the sides.

6. A mold for teeth for diamond saws comprising side pieces having a plurality of grooves therein disposed about the situs ol" the diamonds and having its bottom upwardly arched longitudimilly of the. mold.

7. A lnold for tooth vl'or diamond saws comprising side pieces having a pluralityy of grooves therein disposed about the sitas of the dianiomls and having its bottom upwardly arched lmigitlulinally ol" the mold, the lateral edges ol the bottom boing beveled to l'orm grooves with the sides.

8. .ln a mold, in combination with side, pieces having a plurality of vertical grooves therein disposed about the situs ol` the diamonds, aT-shaped base pieee having its stem extending upward as a tongue between the sides and forming the, bottom of' the mold.

t). ,ln a mold, in combination with the sides, a Tshaped base pioee having its stem extending upward as a tongue between the sides and forming the bottom of the mold, the bottom being upwardly arched longitudinally of the mold.

1t). .ln a mold, in combination with side pieces having a plurality of vertical grooves therein disposed about the situs of the diamonds, a T-slntped base pieec having its stem extending upward as a tongue between the sides and forming thebottom of the mold and having its lateral edges beveled to form grooves with the sides.

1l. 1n a mold, in combination with side pieces having a plurality of vertical grooves therein disposed about the sitns of the diamonds, a T-shaped base-piece having its stem extending upward as a tongue between the sides and forming the bottom of the. mold, the bottom being upwardly arched longitudinally ol' the. mold.

l2. ln a mold, in combination with side pieces having a plurality of vertical grooves therein disposed about the situs of the diamonds, a T-shaped base piece having its stem extending upward as a tongue between the sides and forming the bottom ol the mold, the bottom being upwardly arched longitudinally ol' the mold and its lateral edges boing beveled to l'orm grooves with the sides.

13. A mold having a gate ol dumb-bell l'orm in cross-section.

14. A mold havin" a gato outwardly Ilaring at the ends am of dumb-bell l'orm in cross-section. l

,15. A mold having a gate. of oblong shape and of dumb-bell l'orm in cross-section, the sides at the middle being parallel and the ends being rounded and outnutrdly llared.

itl. The combination with the sides` of a mold, of a base piece extending between the sides and clamping bolts forJiolding the base p iece in place, the base piece having a portion receiving and bridging across the bolts.

17. 'lhe combination with the sides of a mold, of a base piece extending between the sides and having its lateral edges beveled to form grooves with the sides, and clamping,r

bolts for holding the base piece in plaee, the base pier-o having a. portion receiving and bridging aoross the bolts.

LIS. rl`he combination with the sides ol' a mold, of a base piece extending between the sides and forming the bottom of the mold, the bottom boing upwardly arohed longitudinally of the mold, and clamping bolts lor holding the bese piece in plane, the base pieoe having a portion receiving and bridging aeress the bolts.

lll; 'lhe eolnbination with the sides of a mold, ol' a base pieoe extending upward between the sides to form the bottom of the mold and l'iaving its lateral edges beveled to l'orm grooves with the sides, the bottom being upwardly arehed longitudinally ol the mold, and olamping bolts for holding the base pieee in plaee, the base pieee having a iortion reeeiving and bridging aeross the liolts.

20. 'l`ho combination with the sides of a mold having a plurality of vertioal grooves therein disposed about the situs of the diamonds, of a base pieoe extending between the sides and having its lateral edges beveled to form grooves with the sides, and clamping bolts for holding the base pieeo in place, the base pieee having a portion receiving and bridging aeross the bolts.

2l. A mold for tooth for diamond saws eomprising side pieees adapted to slide. longitndinally relatively te eaeh other, and partition pieees earried alternately by opposite side pieces.

22. A mold .for teeth for diamond saws comprising side pieees adapted to slide 1ongitudinally relatively to eaeh other, partition pieees oarried by alternate sides ol t ie mold, and a bottom arched upwardly longitudinally of the mold.

23. A mold for tooth for diamond saws.v

eomprising side pieees adapted to slide longitudinally relatively to eaeh other, mrtition pieees earried by alternate. sides of die mold, and aT-shal'iedpieee extending upwardly as a tongue between the sides and forming the bottom of the mold.

24. A mold for tooth for diamond saws having side pieees adapted to slide longitudinally relatively to eaeh other, )artition pieees earried by alternate sides of tlie mold, and aT-shaped piece extending upwardly as a tongue between the sides and forming the bottom of the mold, the bottom being npwardly arehed longitudinally of the mold.

' 25,. The combination with the sides of a mold having a lurality of vertical grooves therein disposed) about the situs of the diamonds, of a base piece extending upward ben32,4ss

tween. the sides to form the bottom of the mold and having its lateral edges beveled to form grooves with the sides, the bottom being upwardly arohed longitudinally of the mold, and elainping bolts for holding the base p iece in plane, the base pieee having a portion reoelvnig and bridging aeross the bolts.

2o. A mold for teeth for diamond saws comprising sectional sides, the lower side pieoos being stationary and the upper side pieees being adapted to slide longitudinally relatively to eaoh other, a T-shaped base pieee having its stem extending upwardly as a tongue lnitween the lower side pieees and forming the bottom of the mold, and partition pieces oarried alterimtely by the upper side pieees and extending between the lower side pieees to the bottom of the mold.

27. A mold for teeth for diamond saws comprising seetional sides, the lower side pieees being stationary and having a plurality of vertical grooves disposed about the situs of the diamonds and the upper side pieees being adapted to slide longitudinally relatively to eaoh other, a T-shaped base pieee having its stom extending upwardly as a tongue between the lower side iieees and forming the bottom of the mold, the bottom being upwardly arehed longitudinally of the mold and having its lateral edges beveled to form grooves with the sides, and partition pieces carriedv alternately by the upper sido pieees and extending between the lower side pieoes to the bottom of the mold.

28. A mold for teeth for diamond saws eomprising sectional sides, the lower sido pieres being stationary and having a plurality of Avertioal grooves disposed about the situs of the diamonds and the upper side pieces being adapted to slidelongitudinally relative to eaeh other, aT-shaped base piece .having its stem extending u )wardly as a tongue between the lower site pieees and forming the bottom of the mold, the bottom being upwardly arched longitudinally of the mold and having its lateral edges beveled to form grooves with the sides, partition pieces carried alternately by the upper side pieees and extending between the lower side pieces to the bottom of the mold, and a gate of dumb-bell form in cross-section and el' oblong sha ie at its inner oriliee, the sides of the fate at the middle being parallel and the ends eing rounded and outwardly ilared.

In testimony whereof I have aillixed my signature in presence of two witnesses.

WILLARD F. MEYE'RS. Witnesses:

VICTOR D. Bonsr, BERNARD Cowan. 

